20512116460253 has 16 divisors (see below), whose sum is σ = 22466536737792. Its totient is φ = 18572686830000.

The previous prime is 20512116460183. The next prime is 20512116460291. The reversal of 20512116460253 is 35206461121502.

It is a cyclic number.

It is not a de Polignac number, because 20512116460253 - 2¹² = 20512116456157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512116469253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8341178 + ... + 10516628.

It is an arithmetic number, because the mean of its divisors is an integer number (1404158546112).

Almost surely, 2^{20512116460253} is an apocalyptic number.

It is an amenable number.

20512116460253 is a deficient number, since it is larger than the sum of its proper divisors (1954420277539).

20512116460253 is a wasteful number, since it uses less digits than its factorization.

20512116460253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178896.

The product of its (nonzero) digits is 86400, while the sum is 38.

Adding to 20512116460253 its reverse (35206461121502), we get a palindrome (55718577581755).

The spelling of 20512116460253 in words is "twenty trillion, five hundred twelve billion, one hundred sixteen million, four hundred sixty thousand, two hundred fifty-three".